@[deleted]
Sorry, I am not involved in the osticket development nor part of the development nor a forum moderator / part of the forum team, only a huge osticket enthusiast
So I suggest joining the osticket mailing list to get notified of new releases (can't find the URL to sign up right now, just search the forum or google it) and wait for new releases.
Btw. I applied the fix by copying the whole osTicket directory, replacing the 5 files and since I used a symbolic link to the directory of my osticket installation on my apache webserver, I just changed this symlink to point to the new osticket install dir which include the fix. In case of e.g a new bug I would then be able to switch back really fast this way to the original 1.9.1 osticket installation.